Objective@#To observe the migration of 4,4'-diaminostilbene-2,2'-disulfonc
acid-based fluorescent
whitening agents ( DSD-FWAs ) in
food packaging paper, so as to provide evidence for quality and
safety supervision for
paper packaging materials.@*
Methods@#Forty-one
paper samples with DSD-FWAs positive were made into 6 cm2 pieces and were soaked in four
food simulants (
distilled water, 3%
acetic acid, 10%
ethanol and 95%
ethanol, 10 mL each ). The experiment was carried out at the specified soaking
temperature and
time. The migration amounts of eleven DSD-FWAs were detected by
high performance liquid chromatography-
fluorescence detection. @*Results@#C.I.220, C.I.24, C.I.210, C.I.85, C.I.113, C.I.264, C.I.353 and C.I.357 were found in all the four
food simulants. At the same
time and
temperature, the migration amount was highest in 10%
ethanol, followed by
distilled water, 3%
acetic acid and 95%
ethanol. C.I.220 was dissolved in all four
food simulants, in the range of 20-90 ℃, the migration amount increased with soaking
temperature; at 20 ℃, 40 ℃ and 60 ℃, the migration amount increased first and then stabilized over
time.@*Conclusion@#The higher the storage
temperature and the longer the storage
time of
paper packaging, the easier the DSD-FWAs in
packaging paper migrate to
food.